[How do I?] Boice Crane Wilton Drill Press Tear Down Problem

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benkeller3

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Bought this great drill press at an estate sale. The variable speed was froze up.

I have gotten it to open up some on the speed adjust pulley but would like to take it off and skim off some of the rust and polish up the shafts a bit in the lathe but I can not figure out how it comes off the spindle.

The only possible thing I can see would be to pull the bearing in the top and maybe there is a key in there somehow. The top movable pulley does not have a visable keyway but the shafts of the bottom pulley does.

Any ideas?
 
Find a parts breakdown diagram and reverse engineer it…Good Luck, Dave.
 
Try googling " wilton variable speed drill press diagram "

In the picture it looks as though the sheave didn't close fully after you got them opened up.
The spring should force them close together without some force or binding to hold them apart.
Look for a keeper or spring clip or nut at the end of the shaft.
The spring is powerful and you will need to hold it in compression to remove a clip.
Having the sheaves close together , if it will move, will greatly reduce the spring pressure.
 
This looks rather similar to a Roto-Cone variable speed pulley I recently fooled around with. In that case, as tertiaryjim points out, you will want those two flanks to be close together -- like maybe an eighth of an inch apart at the bottom of the belt groove. When they are apart like your photo the one sheave actually slides over top of where the key and allen head set screw bind the pulley to the shaft. In other words, I think you need to get the two flanks together in order to see the set screw.

-frank
 
Thanks for your replies.

Maybe this drawing will help

the top cone is one piece with a bearing the top and speed adjustment arm push point in the top but not removable from the bearing. (maybe cir-clip below bearing??)

the bottom cone is stationary on the spindle and does not move up and down . This is opposite of the newer one this moves and top is stationary. with the top pulled up (driven up .. had not moved in years) there is the bottom of a keyway just starting to show.. Yellow drawing ... actually on the back side in the photo.

no other fasteners or clips can be seen .... nothing is exposed when the two peices are side together.

wilton.jpg
 
Oh one other thing ... the cones with the springs are on the motor end in the back.... There may be a spring in this but I was thinking the spring in the back caused the back cone to close down and and thus force the front as open as the adjuster would let it.
 
Well an update.

I was able to continue to tap the top cone off with a brass rod. BUT i can not figure out what this liner is. It is like some sort of sort of slippery material but is difficult to sand smooth. I can not turn it as it has a key built in. It is still a very tight fit. Tried Teflon dry lube and oil nothing seems to loosen it up. I am thinking I just need to keep filing it down a little until i can move it up and down smoothly with some effort.

I was able to polish up the shaft and take the rust off the cones. It looks like someone used a steel rod at some time to try to pound apart the cones. Or it could be a manufacturing defect. I included a picture of it. I am thinking to just leave it ... worried if I tig fill it I will warp the cone.

Thoughts?

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That butterfly mark looks very similar to one that a slot screwdriver leaves on surrounding surface when it jumps out of the screw head that one is trying to drive! Bizarre place for that to happen though.

Wonder if the black liner is something like a Nylatron, at least I think that's the trade name. It's like a graphite impregnated nylon -- hard and very slick. Used for bushings and bearing surfaces, machines extremely well but sands like crap. I've used it a fair bit for replacing worn out bronze pieces. Sharp files work better, but still extremely slow.

-frank
 
Thanks Frank.
I will switch to a little file and see if I can clean it up better.

Sent from my SCH-I605 using Tapatalk
 
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